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Note 15 - Stockholders' Equity (Details) - Summary of 2001 Plan for Restricted Stock Grants (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 15 - Stockholders' Equity (Details) - Summary of 2001 Plan for Restricted Stock Grants [Line Items]      
Total compensation cost attributable to shares awarded $ 809,000 $ 694,000 $ 503,000
Restricted Stock [Member] | Non-Employee Director [Member]
      
Note 15 - Stockholders' Equity (Details) - Summary of 2001 Plan for Restricted Stock Grants [Line Items]      
Shares awarded to each non-employee director 4,975 5,155 3,418
Restricted Stock [Member]
      
Note 15 - Stockholders' Equity (Details) - Summary of 2001 Plan for Restricted Stock Grants [Line Items]      
Shares awarded to each non-employee director 34,825 30,930 20,508
Average grant-date market price per share $ 10.06 $ 9.70 $ 14.46
Total compensation cost attributable to shares awarded 350,000 300,000 297,000
Compensation cost recognized related to current and prior year awards $ 333,499 $ 283,333 $ 194,667